Synthesis and luminescence properties of Eu(III)-doped nanoporous silica spheres
Synthesis and luminescence properties of Eu(III)-doped nanoporous silica spheres
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DOI：
10.1016/j.jcis.2011.07.066
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发表时间：
2011-11-15
影响因子：
9.9
通讯作者：
Tanaka, Junzo
中科院分区：
文献类型：
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作者：
Tagaya, Motohiro;Ikoma, Toshiyuki;Tanaka, Junzo
合成了Eu3+掺杂的纳米多孔二氧化硅微球，并研究了Eu3+离子在二氧化硅骨架结构中的状态。当Eu3+的摩尔浓度达到10mol%时，有序的纳米孔得到了保留，掺杂后结构中的O-Si-O和Si-OH基团明显重排，表明Eu3+与O原子发生了相互作用。掺杂后，球体的形态发生了明显的变化。由D-5(0)-F-7(1)和D-5(0)-F-7(2)跃迁产生的光致发光光谱表明Eu3+存在于低对称性的环境中。研究发现，Eu3+位于二氧化硅骨架内，与环境中的O原子发生静电相互作用，从而阻止Eu3+离子之间的聚集，从而显示出高效的发光。因此，成功地阐明了Eu3+离子与球体中二氧化硅骨架结构的相互作用。(C)2011 Elsevier Inc.保留所有权利。
Europium (III) (Eu3+)-doped nanoporous silica spheres were synthesized, and the states of Eu3+ ions in the silica framework structure were investigated. The ordered nanopores were preserved with the doping at the Eu3+ molar concentration to Si up to 10 mol%, and the O-Si-O and Si-OH groups in the structures were clearly rearranged with the doping, indicating the interaction of Eu3+ with the O atoms. The significant morphological changes in the spheres were observed with the doping. The photoluminescence spectral shapes due to the transitions of D-5(0)-F-7(1) and D-5(0)-F-7(2) were indicative of the presence of the Eu3+ in an environment of a low symmetry. It was found that the Eu3+ was located inside the silica framework to electrostatically interact with the environmental O atoms, which would prevent the aggregation among Eu3+ ions to show the efficient luminescence. Therefore, the interactions between the Eu3+ ions and silica framework structures in the spheres were successfully clarified. (C) 2011 Elsevier Inc. All rights reserved.